Linux中与驱动相关的ioctl函数(2)

  memset (vd->cameraname, 0, sizeof (vd->cameraname));
  memset(vd->bridge, 0, sizeof(vd->bridge));
  vd->signalquit = 1;//信号设置
  vd->hdrwidth = width;
  vd->hdrheight = height;
  /*          compute the max frame size   */
  vd->formatIn = format; //传进来的 format = VIDEO_PALETTE_JPEG;
  vd->bppIn = GetDepth (vd->formatIn);
 

vd->grabMethod = grabmethod;        //mmap or read
  vd->pFramebuffer = NULL;
  /* init and check all setting */

  err = init_v4l (vd); // V4L初始化函数
  ....................................................
}